An air controller for an air pump capable of simply regulating the air delivery rate of the air pump. In an air pump including an electromagnetic driving mechanism 11, 13, 14, a magnet 17 carried on the tip of an arm 16, and a diaphragm 18 connected to the intermediate portion of the arm, the magnet being reciprocated by an electromagnetic action exerted between the electromagnetic driving mechanism and the magnet, the intake and discharge action being effected by the expansion and contraction of the diaphragm, the improvement lies in that the electromagnetic driving mechanism is mounted on a housing in such a manner that it is capable of advancing and retreating with respect to the magnet, whereby the advancement and retreat of the electromagnetic driving mechanism will cause the distance between the core 13 and magnet 17 and hence the reciprocating rate of the magnet to change, thus accomplishing the change of the air delivery rate.
6168392 - Air pump - Owned by Kabushiki Kaisha Tominaga Jyushi Kogyosho (Osaka,JP)
An air pump includes an outer casing and a pump unit provided in the outer casing. The pump unit includes a diaphragm, a diaphragm-driving unit for driving the diaphragm, and a pump casing to which the diaphragm is attached. The pump casing has an inside space which is divided into an air-inlet side chamber communicating with an inside space of the diaphragm via an inlet opening with an inlet valve and an air-outlet side chamber communicating with the inside space of the diaphragm via an outlet opening with an outlet valve. The pump unit further includes a silencing unit provided in at least one of the chambers. The silencing unit includes an inner pipe having an opened tip end and an outer pipe having a closed bottom end. The outer pipe loosely covers the inner pipe with the closed bottom end facing the opened tip end, whereby air to be introduced into the diaphragm or to be sent out of the diaphragm flows through the silencing unit while changing a flow direction of air at the closed bottom end of the outer pipe.
A linear electrical machine may function as an alternator or a motor. Three annular magnets may be provided that move relative to a core. The magnets may all have a different magnetic orientation. Two magnets may have a north pole oriented in a direction parallel to an axis along which the magnets move relative to the core. Another magnet may have a north pole oriented in a direction perpendicular to the axis.
